GASTROINTESTINAL HEMORRHAGE (2): Melena. Melena, the passage of black, tarry stools, usually implies blood loss greater than 500 ml originating anywhere between the oropharynx and the right hemicolon. Melena occurs most often, Melena an overview ScienceDirect Topics Understanding Melena: What Does It Mean When You Have Dark Stools? Fortis Healthcare What Does Clay Colored Stool Mean
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melenic or melanotic stools What Causes Black or Tarry Stool?